Open English Wordnet
Nouns
(n)halcyona mythical bird said to breed at the time of the winter solstice in a nest floating on the sea and to have the power of calming the winds and waves Adjectives
(s)halcyonidyllically calm and peaceful; suggesting happy tranquillity“a halcyon atmosphere” (s)golden, halcyon, prosperousmarked by peace and prosperity“a golden era”,
“the halcyon days of the clipper trade”